用不同浓度 (100～ 400mg/L)的 Zn(NO3)2和 Zn(NO3)2＋ Ca(NO3)2溶液处理蒜鳞茎发现：高 Zn2＋对蒜根有毒害作用 ,随浓度增大和处理时间延长 ,细胞有丝分裂指数下降 ,而核异常细胞比率先升 (100～ 300mg/L)后降 (400mg/L).在 Zn2＋中加入 Ca2＋ ,能提高细胞有丝分裂指数 ,降低核异常细胞比率 ,变化总趋势与单 Zn2＋类似 ,但核异常
On the basis of the viewpoint of preparation of strong earthquakes in group, the spatial andtemporal scanning characteristics of the seismicity in the South Yellow Sea and its coast regionare studied,
In this paper, we discussed the seismotectonic environment of the deep-seated and shallowcrust and seismological and geological model caused the 1927 Gulang great earthquake, basedon the recent resear
This paper discussed the random distribution of the loading and unloading response ratio(LURR) of different definitions(Y_1～Y_5)using the assumptions that the earthquakes occurfollowing the Poisson pr
The data of pre-seismic subsurface fluid anomalies of such earthquakes as Datong-YanggaoM_s6.1 event on Oct.19,1989,western Baotou M_s6.4 event on May 3,1996 and Zhangbei-Shangyi M_s6.2 event on Jan.1
Five principles and methods are proposed for estimating the maximum potential earthquakesin low seismicity areas,and their applicabilities are discussed,taking Sichuan basin as asample area.The propos
Paleoearthquakes in the Yanqing-Huailai basin and on the Haiyuan fault are studied in detail.The result indicates that the recurrence behavior of large earthquakes is of a wide variety.Characteristic
Based on the results of multiple geophysical research methods,the lithosphere thicknessisolines of the northeastern margin of Sino-Korean platform and its neighboring area havebeen compiled and the ge
Making use of the method of obtaining regional vertical strain rate from regional preciseleveling data and gaining dynamic pattern combining with deformation data on spanningfaults, the regional verti